Icahn had tried to scuttle the buyout, asking a Delaware judge to force Dell to hold its annual shareholder meeting before the takeover vote. He had hoped to convince investors to oust Michael Dell and other Dell board member and elect a board aligned with his views. The judge said the court wouldn't hear the case.

On Tuesday Dell said it had received all necessary pre-merger regulatory clearances needed for its $25 billion merger transaction with Michael Dell and investment partner Silver Lake Partners.